var browser={
    versions:function(){
        var u = navigator.userAgent,
            app = navigator.appVersion;
        return {
            trident: u.indexOf('Trident') > -1, //IE内核
            //presto: u.indexOf('Presto') > -1, //opera内核
            //webKit: u.indexOf('AppleWebKit') > -1, //苹果、谷歌内核
            gecko: u.indexOf('Gecko') > -1 && u.indexOf('KHTML') == -1,//火狐内核
            //mobile: !!u.match(/AppleWebKit.*Mobile.*/), //是否为移动终端
            //ios: !!u.match(/\(i[^;]+;( U;)? CPU.+Mac OS X/), //ios终端
            //android: u.indexOf('Android') > -1 || u.indexOf('Adr') > -1, //android终端
            //iPhone: u.indexOf('iPhone') > -1 , //是否为iPhone或者QQHD浏览器
            //iPad: u.indexOf('iPad') > -1, //是否iPad
            //webApp: u.indexOf('Safari') == -1, //是否web应该程序，没有头部与底部
            //weixin: u.indexOf('MicroMessenger') > -1, //是否微信
            //qq: u.match(/\sQQ/i) == " qq" //是否QQ
        };
    }(),
    language:(navigator.browserLanguage || navigator.language).toLowerCase()
}
var prefix = function stylePrefix(){
    var prefix = ['','-webkit-'];
    if(browser.versions.gecko){
         prefix.push('-moz-');
    }else  if(browser.versions.trident){
        prefix.push('-ms-')
    }
    return prefix;
}();